Analysis of the Design Efficiency of Ships that have Entered the Fleet since 2009. 

All ships built after 1 January 2013 need to have an Energy Efficiency Design Index. This measure of design fuel efficiency needs to be better than a reference value which depends on the ship type and size. This study analyses the development of the design efficiency of ships that have entered the fleet from 2009 to 2016. This study finds that the average design efficiency of new ships has improved in recent years. However, the efficiency improvements seem to have stalled in 2016. 

Estimated index values of ships 2009 2016 CE Delft Study